OpenAI's o1 model, launched in September 2024, is not a traditional chat model but a 'report generator' designed for delivering well-reasoned, structured outputs in a single attempt. Users have found that to effectively use o1, they must provide extensive context upfront, treating the model like a new hire. Instead of instructing the model on how to answer, users should specify what they want the output to be, allowing o1 to autonomously plan and resolve its steps. This approach has been successful for users like Ben Hylak, who transitioned from skepticism to daily use of o1 for critical tasks. The model excels at one-shotting entire files, explaining complex engineering concepts, and providing accurate medical diagnoses, though it struggles with writing in specific voices or styles and building entire applications. The o1-mini version costs $15.00 per million input tokens, while the upcoming o3 model is also anticipated.